Re: [PATCH] ltdl: set libltdl_cv_need_uscore to yes on OS/2

Hi/2.

Gary V. Vaughan wrote:
> Hi,
> 
> Thanks for the report and the patch!
> 
> On Nov 22, 2014, at 4:08 AM, KO Myung-Hun <[email protected]> wrote:
>>
>> On OS/2, dlopen() does not support a program. So libltdl_cv_need_uscore
>> is set to unknown, but dlsym() requires an underscore prefix. So set
>> libltdl_cv_need_uscore to yes on OS/2 if lt_cv_sys_symbol_underscore is
>> yes and libltdl_cv_need_uscore is unknown.
> 
> Actually, I think the real problem here is that LT_FUNC_DLSYM_USCORE is
> making the bad assumption that dlsym() only requires a leading symbol
> name underscore on machines where self dlopening works.
> 
> Better than your suggested patch, we should really be checking whether
> dlsym of ordinary loadable module symbol names requires a leading underscore.

I agree.

> I pushed the core of a new macro that does exactly that to M4 master just
> now.
> 
> Would you let me know whether this works correctly on OS2 for you please?
> 

Of course. Unfortunately, however, it does not work. dlopen() in
configure fails due to 'file not found'.

-- 
KO Myung-Hun

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